Nickname for Marg Helgenberger of CSI. Given to her by Gary Dourdan at the time of Fergie's "Fergalicious" came out. Marg's fans have come to use the nickname to describe anything pertaining to Marg (or otherwise) as lovely, sexy, sweet, gorgeous, smart, funny, witty, sassy, adorable, eye candy, perfect, etc.
Did you see last night's CSI? It was so Margalicious!
1) An adjective used to describe a man named Greg, Gregory or Gregorio who is very tasty and delicious.
2) The state of deliciousness, attractiveness and general appeal of a certain man named Greg.
That man is gregalicious!
Gregory is particularly gregalicious today. I think he will need to be pleasured and spoiled.